diff --git a/poetry.lock b/poetry.lock
index 903f37a..3b1afc1 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -2248,28 +2248,29 @@ files = [
 
 [[package]]
 name = "ruff"
-version = "0.4.10"
+version = "0.6.1"
 description = "An extremely fast Python linter and code formatter, written in Rust."
 optional = false
 python-versions = ">=3.7"
 files = [
-    {file = "ruff-0.4.10-py3-none-macosx_10_12_x86_64.whl", hash = "sha256:5c2c4d0859305ac5a16310eec40e4e9a9dec5dcdfbe92697acd99624e8638dac"},
-    {file = "ruff-0.4.10-py3-none-macosx_11_0_arm64.whl", hash = "sha256:a79489607d1495685cdd911a323a35871abfb7a95d4f98fc6f85e799227ac46e"},
-    {file = "ruff-0.4.10-py3-none-manylinux_2_17_aarch64.manylinux2014_aarch64.whl", hash = "sha256:b1dd1681dfa90a41b8376a61af05cc4dc5ff32c8f14f5fe20dba9ff5deb80cd6"},
-    {file = "ruff-0.4.10-py3-none-manylinux_2_17_armv7l.manylinux2014_armv7l.whl", hash = "sha256:c75c53bb79d71310dc79fb69eb4902fba804a81f374bc86a9b117a8d077a1784"},
-    {file = "ruff-0.4.10-py3-none-manylinux_2_17_i686.manylinux2014_i686.whl", hash = "sha256:18238c80ee3d9100d3535d8eb15a59c4a0753b45cc55f8bf38f38d6a597b9739"},
-    {file = "ruff-0.4.10-py3-none-manylinux_2_17_ppc64.manylinux2014_ppc64.whl", hash = "sha256:d8f71885bce242da344989cae08e263de29752f094233f932d4f5cfb4ef36a81"},
-    {file = "ruff-0.4.10-py3-none-manylinux_2_17_ppc64le.manylinux2014_ppc64le.whl", hash = "sha256:330421543bd3222cdfec481e8ff3460e8702ed1e58b494cf9d9e4bf90db52b9d"},
-    {file = "ruff-0.4.10-py3-none-manylinux_2_17_s390x.manylinux2014_s390x.whl", hash = "sha256:9e9b6fb3a37b772628415b00c4fc892f97954275394ed611056a4b8a2631365e"},
-    {file = "ruff-0.4.10-py3-none-manylinux_2_17_x86_64.manylinux2014_x86_64.whl", hash = "sha256:0f54c481b39a762d48f64d97351048e842861c6662d63ec599f67d515cb417f6"},
-    {file = "ruff-0.4.10-py3-none-musllinux_1_2_aarch64.whl", hash = "sha256:67fe086b433b965c22de0b4259ddfe6fa541c95bf418499bedb9ad5fb8d1c631"},
-    {file = "ruff-0.4.10-py3-none-musllinux_1_2_armv7l.whl", hash = "sha256:acfaaab59543382085f9eb51f8e87bac26bf96b164839955f244d07125a982ef"},
-    {file = "ruff-0.4.10-py3-none-musllinux_1_2_i686.whl", hash = "sha256:3cea07079962b2941244191569cf3a05541477286f5cafea638cd3aa94b56815"},
-    {file = "ruff-0.4.10-py3-none-musllinux_1_2_x86_64.whl", hash = "sha256:338a64ef0748f8c3a80d7f05785930f7965d71ca260904a9321d13be24b79695"},
-    {file = "ruff-0.4.10-py3-none-win32.whl", hash = "sha256:ffe3cd2f89cb54561c62e5fa20e8f182c0a444934bf430515a4b422f1ab7b7ca"},
-    {file = "ruff-0.4.10-py3-none-win_amd64.whl", hash = "sha256:67f67cef43c55ffc8cc59e8e0b97e9e60b4837c8f21e8ab5ffd5d66e196e25f7"},
-    {file = "ruff-0.4.10-py3-none-win_arm64.whl", hash = "sha256:dd1fcee327c20addac7916ca4e2653fbbf2e8388d8a6477ce5b4e986b68ae6c0"},
-    {file = "ruff-0.4.10.tar.gz", hash = "sha256:3aa4f2bc388a30d346c56524f7cacca85945ba124945fe489952aadb6b5cd804"},
+    {file = "ruff-0.6.1-py3-none-linux_armv6l.whl", hash = "sha256:b4bb7de6a24169dc023f992718a9417380301b0c2da0fe85919f47264fb8add9"},
+    {file = "ruff-0.6.1-py3-none-macosx_10_12_x86_64.whl", hash = "sha256:45efaae53b360c81043e311cdec8a7696420b3d3e8935202c2846e7a97d4edae"},
+    {file = "ruff-0.6.1-py3-none-macosx_11_0_arm64.whl", hash = "sha256:bc60c7d71b732c8fa73cf995efc0c836a2fd8b9810e115be8babb24ae87e0850"},
+    {file = "ruff-0.6.1-py3-none-manylinux_2_17_aarch64.manylinux2014_aarch64.whl", hash = "sha256:2c7477c3b9da822e2db0b4e0b59e61b8a23e87886e727b327e7dcaf06213c5cf"},
+    {file = "ruff-0.6.1-py3-none-manylinux_2_17_armv7l.manylinux2014_armv7l.whl", hash = "sha256:3a0af7ab3f86e3dc9f157a928e08e26c4b40707d0612b01cd577cc84b8905cc9"},
+    {file = "ruff-0.6.1-py3-none-manylinux_2_17_i686.manylinux2014_i686.whl", hash = "sha256:392688dbb50fecf1bf7126731c90c11a9df1c3a4cdc3f481b53e851da5634fa5"},
+    {file = "ruff-0.6.1-py3-none-manylinux_2_17_ppc64.manylinux2014_ppc64.whl", hash = "sha256:5278d3e095ccc8c30430bcc9bc550f778790acc211865520f3041910a28d0024"},
+    {file = "ruff-0.6.1-py3-none-manylinux_2_17_ppc64le.manylinux2014_ppc64le.whl", hash = "sha256:fe6d5f65d6f276ee7a0fc50a0cecaccb362d30ef98a110f99cac1c7872df2f18"},
+    {file = "ruff-0.6.1-py3-none-manylinux_2_17_s390x.manylinux2014_s390x.whl", hash = "sha256:b2e0dd11e2ae553ee5c92a81731d88a9883af8db7408db47fc81887c1f8b672e"},
+    {file = "ruff-0.6.1-py3-none-manylinux_2_17_x86_64.manylinux2014_x86_64.whl", hash = "sha256:d812615525a34ecfc07fd93f906ef5b93656be01dfae9a819e31caa6cfe758a1"},
+    {file = "ruff-0.6.1-py3-none-musllinux_1_2_aarch64.whl", hash = "sha256:faaa4060f4064c3b7aaaa27328080c932fa142786f8142aff095b42b6a2eb631"},
+    {file = "ruff-0.6.1-py3-none-musllinux_1_2_armv7l.whl", hash = "sha256:99d7ae0df47c62729d58765c593ea54c2546d5de213f2af2a19442d50a10cec9"},
+    {file = "ruff-0.6.1-py3-none-musllinux_1_2_i686.whl", hash = "sha256:9eb18dfd7b613eec000e3738b3f0e4398bf0153cb80bfa3e351b3c1c2f6d7b15"},
+    {file = "ruff-0.6.1-py3-none-musllinux_1_2_x86_64.whl", hash = "sha256:c62bc04c6723a81e25e71715aa59489f15034d69bf641df88cb38bdc32fd1dbb"},
+    {file = "ruff-0.6.1-py3-none-win32.whl", hash = "sha256:9fb4c4e8b83f19c9477a8745e56d2eeef07a7ff50b68a6998f7d9e2e3887bdc4"},
+    {file = "ruff-0.6.1-py3-none-win_amd64.whl", hash = "sha256:c2ebfc8f51ef4aca05dad4552bbcf6fe8d1f75b2f6af546cc47cc1c1ca916b5b"},
+    {file = "ruff-0.6.1-py3-none-win_arm64.whl", hash = "sha256:3bc81074971b0ffad1bd0c52284b22411f02a11a012082a76ac6da153536e014"},
+    {file = "ruff-0.6.1.tar.gz", hash = "sha256:af3ffd8c6563acb8848d33cd19a69b9bfe943667f0419ca083f8ebe4224a3436"},
 ]
 
 [[package]]
@@ -3057,4 +3058,4 @@ test = ["big-O", "importlib-resources", "jaraco.functools", "jaraco.itertools",
 [metadata]
 lock-version = "2.0"
 python-versions = "^3.9"
-content-hash = "8c852632b6567045f648607e18595ef675d70c28dec7c32be9be3c65eee215e0"
+content-hash = "a03ae622e5e0c2e18de03425f63de7f347fe5193bced217b6754451d2852255a"
diff --git a/pyproject.toml b/pyproject.toml
index 2686329..da11358 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -41,7 +41,7 @@ tzlocal = "^5.2"
 # linting etc
 mypy = "^1.10.0"
 pre-commit = "^3.7.0"
-ruff = "^0.4.2"
+ruff = ">=0.4.2,<0.7.0"
 pymarkdownlnt = "^0.9.17"
 
 # task runner
diff --git a/requirements-dev.txt b/requirements-dev.txt
index b9b89c0..c1a1ff1 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -99,7 +99,7 @@ regex==2024.5.15 ; python_version >= "3.9" and python_version < "4.0"
 requests==2.32.3 ; python_version >= "3.9" and python_version < "4.0"
 rich==13.7.1 ; python_version >= "3.9" and python_version < "4.0"
 rtoml==0.10.0 ; python_version >= "3.9" and python_version < "4.0"
-ruff==0.4.10 ; python_version >= "3.9" and python_version < "4.0"
+ruff==0.6.1 ; python_version >= "3.9" and python_version < "4.0"
 shellingham==1.5.4 ; python_version >= "3.9" and python_version < "4.0"
 simple-toml-settings==0.6.1 ; python_version >= "3.9" and python_version < "4.0"
 six==1.16.0 ; python_version >= "3.9" and python_version < "4.0"